Metavariables can be keywords

[jonas-schievink]

No description provided.

[ehuss]

Thanks! Do you happen to know the history here? It looks like this changed in 1.17 (though there weren't any notes about it). I'm guessing it was via rust-lang/rust#39419?

It looks like this also allows raw identifiers. Example:

macro_rules! foo {($r#fn:expr) => {$r#fn};}

which seems a little odd to me. 🤷 Maybe the "identifiers" page should have a production for whatever "ident or keyword or raw keyword" should be called?

Dunno if this is actually intended.

[jonas-schievink]

I have no idea about the history here, sorry. I just noticed that rust-analyzer does some gymnastics to also allow keywords here, and realized that rustc also allows them.

[jonas-schievink]

Maybe the "identifiers" page should have a production for whatever "ident or keyword or raw keyword" should be called?

Is there any place in Rust where a normal ident is allowed but a raw ident isn't?

[ehuss]

Is there any place in Rust where a normal ident is allowed but a raw ident isn't?

LIFETIME_OR_LABEL

[mattheww]

This change was later made in #1130.

[ehuss]

Indeed, I think this can be closed, thanks!